I'm about to take my first dive into the world of airbrushing. The Cemetery Entrance Columns I'm working on are just about done. I've painted the brick areas and they look awesome, however, the rest of the prop is painted in a nice, light shade of grey and it looks too clean to be old and delapidated. I'm thinking that the use of an airbrush would work nicely to shadow certain areas and to make the things look a little more grungy. Anyone have any experience with airbrushing?